Stretchable device
A stretchable device that includes: a first substrate; a stretchable first wiring on the first substrate; a second substrate facing the first substrate in a first direction that is a thickness direction of the first substrate; a second wiring on the second substrate and facing the first wiring in the first direction; a connection member electrically connecting the first wiring and the second wiring; and a first protective layer at least between the second substrate and the first wiring in the first direction.
1 . A stretchable device comprising:
a first substrate;
a stretchable first wiring on the first substrate;
a second substrate facing the first substrate in a first direction that is a thickness direction of the first substrate;
a second wiring on the second substrate and facing the first wiring in the first direction;
a connection member electrically connecting the first wiring and the second wiring;
a first protective layer at least between the second substrate and the first wiring in the first direction; and
a second protective layer covering the second wiring, wherein the second protective layer and the first substrate overlap in the first direction;
wherein the second protective layer and the first substrate are in contact with each other and define a void between the second protective layer and the connection member.
2 . The stretchable device according to claim 1 , wherein the first protective layer covers at least a part of the first wiring.
3 . The stretchable device according to claim 1 , wherein an entire portion of the first wiring overlapping the second substrate as viewed from the first direction is covered with at least one of the connection member or the first protective layer.
4 . The stretchable device according to claim 1 , wherein the first wiring and the second wiring overlap each other as viewed in the first direction and define a connection region, the connection region including at least a part of the connection member.
5 . The stretchable device according to claim 4 , wherein an entirety of the connection member is in the connection region.
6 . The stretchable device according to claim 1 , wherein at least a part of the second wiring does not overlap the connection member in a first region where the first wiring and the second wiring do not overlap within a second region where the first substrate and the second wiring overlap as viewed from the first direction.
7 . The stretchable device according to claim 1 , wherein the connection member and the first protective layer are in contact with each other.
8 . The stretchable device according to claim 1 , wherein the first protective layer and the connection member overlap as viewed from the first direction.
9 . The stretchable device according to claim 1 , wherein
the first protective layer has an upper surface closest to the second substrate, a lower surface in contact with the stretchable first wiring, and an end surface connecting the upper surface and the lower surface, and
the lower surface overlaps the second wiring as viewed from the first direction, and the upper surface does not overlap the second wiring as viewed from the first direction.
10 . The stretchable device according to claim 1 , wherein
a part of the first protective layer is in a non-wiring region where the first protective layer does not overlap the first wiring on the first substrate as viewed from the first direction, and
the first protective layer has a recessed portion in the non-wiring region.
11 . The stretchable device according to claim 1 , wherein the first protective layer has insulating properties.
12 . The stretchable device according to claim 1 , further comprising an insulating layer between the first substrate and the first wiring.
13 . The stretchable device according to claim 1 , wherein the first substrate and the second wiring are in contact with each other.
14 . A stretchable device comprising:
a first substrate;
a stretchable first wiring on the first substrate;
a second substrate facing the first substrate in a first direction that is a thickness direction of the first substrate;
a second wiring on the second substrate and facing the first wiring in the first direction;
a connection member electrically connecting the first wiring and the second wiring;
a first protective layer at least between the second substrate and the first wiring in the first direction; and
a second protective layer covering the second wiring, wherein the second protective layer and the first substrate overlap in the first direction;
wherein the second protective layer and the first substrate are in contact with each other, and
the first substrate and the second wiring are in contact with each other in a region between the second protective layer and the connection member.
15 . The stretchable device according to claim 1 , further comprising a third protective layer covering a main surface of the first substrate on a side thereof opposite to the first wiring.
16 . The stretchable device according to claim 15 , further comprising a fourth protective layer covering a main surface of the second substrate on a side thereof opposite to the second wiring.
17 . The stretchable device according to claim 1 , further comprising a fourth protective layer covering a main surface of the second substrate on a side thereof opposite to the second wiring.
18 . The stretchable device according to claim 1 , wherein the connection member contains a plurality of conductive particles.
19 . The stretchable device according to claim 1 , wherein the first substrate and the second wiring are in contact with each other in a region between the second protective layer and the connection member.
20 . The stretchable device according to claim 14 , further comprising a third protective layer covering a main surface of the first substrate on a side thereof opposite to the first wiring.